Improvement in lathe-chucks



' (L -ARCHER. Irnproverrrent in Lathehucks.

I Patented July 23,1872.

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UNITED STATES OOENELIUs AEOHEE, OE nELsONvILLE, OHIO.

IMPROVEMENT IN LATHE'QHUQK Speciication forming part of Letters PatentNo. 129,705, dated July 23, 1872.

Specication describing va new and useful i Improvement in Lathe-Chucks,invented by `chuck adjusted for turning pieces having a hole formedthrough them, parts being broken away to show the construction. Fig. 2is a side view of the same adjusted for holding columns, half andquarter columns, parts being broken away to show the construction. Fig.3 is a face view of one of the parts shown in Figs. land 2. Fig. 4. is adetail sectional view of a part of the'same taken through the line'ww,Fig. 1. Fig. 5 is a face view ofthe same. y

Similar letters of reference indicate corresponding parts.

.My invention has for its object to furnish an improved lathe-chuckv forholding pieces having different-sized holesformed through them, and forholding columns, half and quarter 'columns While being turned orpolished, Without the necessity lof gluing, and

`which shall besimple in construction, convenient in use,'an`d effectivein operation 5 and it consists in the construction and combination ofthe'various parts as hereinafter more fully described.`

. A is a holder, the stem of which is designed to be inserted in thelathe-mandrel,

and the head of ywhich is made cylindrical to enter the hollow base ofthe cone B, and has y -inclined lugs al formed upon its outer surface tointerlock With corresponding lugs b formed upon the inner surfaceh ofthe hollovsr base of the cone B, so that the said cone B may be carriedaround with the saidholder A, in its revolution. 'The cone B is designedto Venter the hole in the piece to be turned or polished, Whatever maybe the size of the said I hole. To the side of the cone B is attached ablade, C, to prevent the piece from-turning While being operated upon. Dis a cone to receive and hold the other end of the piece to beturned orpolished. The cone D is sWiveled to its stem E by a set-screw, F, whichenters a groove in the said stem E, as shown in Fig. l. The stem E isdesigned to be inserted in the tail-stock of the lathe. The forward endor face of theholder A is made With a ilange, a2, around its edge toprevent the pieces from ilying apart while being operated upon. The faceof the holder A is also provided with cross-anges or blades a3 to adaptit for holding half and quart-er columns whilev being operated upon.VWhen turning or polishing solid pieces the ange a2 and thecross-ilang`es or blades a3 are designed to be let into the piece to beheld. G is a holder designed to hold the pieces to be operated upon, andwhich is made with a flange, g', around its face to prevent the piecesfrom iiyin g apart. The stem of the holder Gr is designed to be insertedin the tail-stock of the lathe. By this construction of the holders nogluing Will be necessary toV keep the pieces together While beingoperated upon.

Having thus described my invention, l claimv as new and desire to secureby Letters Patenti The cone B having blade C combined with holder Ahaving inclined lugs a1, circular ange a2, and cross-anges a3, as andfor the purpose described.

v CORNELIUS ARCHER.

v Witnesses:

VEGHEL ARCHER, WASHINGTON ARCHER.

